package collection;

import java.util.*;

/** 集合的排序-----字符串对象*/
public class SortPoint {
    public static void main(String[] args) {
        List<Point>  list = new ArrayList<>();
        list.add(new Point(5,8));
        list.add(new Point(15,60));
        list.add(new Point(57,89));
        list.add(new Point(1,4));
        list.add(new Point(10,8));
        list.add(new Point(22,35));
        System.out.println("list原始数据为:"+list);

        list.sort(new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                return o1.getX()-o2.getX();//按x坐标升序
            }
        });

/*        //自定义排序规则:
        Collections.sort(list, new Comparator<Point>() {
            @Override
            public int compare(Point o1, Point o2) {
                int len1 = o1.getX()*o1.getX()+ o1.getY()*o1.getY();
                int len2 = o2.getX()*o2.getX()+ o2.getY()*o2.getY();
                //return len1-len2;//升
                return len2-len1;//降

                //return o1.getX()-o2.getX()   按x坐标升序
            }
        });
        */
        list.sort((o1, o2) -> {
            int len1 = o1.getX()*o1.getX()+ o1.getY()*o1.getY();
            int len2 = o2.getX()*o2.getX()+ o2.getY()*o2.getY();
            return len1-len2;
        });




        System.out.println(list);
    }
}
